Lock.



J. DURAN.

LOOK.

APPLICATION FILED MAE. 17, 1914.

1,099,493. Patented June 9,19%

Qwumtoz i: TE S 'I EN FICE.

JOHN DURAN, O15 STAMFORD, CONNECTICUT.

LOCK.

Lti99,4=93,

Patented June 9, 1914.

Serial No. 825,289.

To all whom it may concern:

Be it known that 1, JOHN DURAN, a subject of the Emperor ofAustria-Hungary, residing at Stamford, in the county of Fairfield andState of Connecticut, have invented certain new and useful Improvementsin Locks, of which the following is a specification.

This invention relates to certain new and useful improvements in looks.

The primary object of the invention is to provide an automatic auxiliarylocking means in connection with any form of bolt lock and theemployment of which renders impossible, the unauthorized picking of akey-hole lock.

A further object is to provide an attachment readily applied to any formof sliding bolt lock and whereby the bolt is prevented from withdrawalfrom a point outside the door even by the employment of the regular keyprovided for said look.

A still further object is to provide an auxiliary gravity catch for thesliding bolt of a lock and positionable interiorly of the door and whilereadily disengaged from within, being impossible of disengagement fromwithout, excepting by the employment of a separate auxiliary keyespecially designed therefor.

With these general objects in View and others that Will appear as thenature of the invention is better understood, the same consists in thenovel combination and arrangement of parts hereinafter fully described,illustrated in the accompanying drawings, and pointed out in theappended claims.

In the drawings forming a part of this application and in which likedesignating characters refer to corresponding parts throughout theseveral views :-Figure 1 is a side elevation of a portion of the innerside of a door and easing having the invention mounted thereon. Fig. 2is a plan view of the lock with the front plate thereof removed. Fig. 3is a vertical transverse sectional view through the lock detached. Fig.4 is a perspective view of one corner portion of the lock detached,showing the present mechanism thereon and Fig. 5 is a special keyserviceable with the present auxiliary lock.

Referring more in detail to the drawings, the door 10 is illustrated ashaving the lock casing 11 secured thereto and properly positioned forengaging the sliding bolt 12 and spring catch bolt 1.3 thereof with theordinary keeper M- mounted upon the side casing 15 of the door-way. Uponthe top 16 of the casing as normally positioned upon a door and asherein illustrated, is pivotally mounted a gravity locking hook 17 beingtrunnioned upon the pin 18 of the lugs 19.

The sliding bolt 12 of the lock is provided with a recess or notch 20while the front or cover 21 of the casing has the slot 22 therethrough,the slot being so positioned as to normally receive the free end 23 ofsaid locking hook 17 and by reason of the weight of said hook and therelative position of its pivot pin 18, such end normally projectingthrough said slot resting against the plane side face 24 of the slidingbolt.

The recess 20 being of suflicient size to receive and seat therein thehook end 23, it will be evident that upon an outward sliding of the boltto its locked position, said hook end will drop within the recess 20 andthereby retain the bolt against a return movement.

With the locking hook so positioned within the recess 20, it will beseen that even though the proper key is inserted through the key-hole 25of the lock, that the same upon being turned, will be ineffectual inretracting the bolt but it will be also obvious that the usual slidingof the bolt will be rendered possible by the manual raising of thelocking hook and its dis-engagementfrom the bolt recess.

From a point on the inner side of the door, it will be apparent that byelevating the hook 17 by the hand of the operator, the key may then bereadily employed for unlocking the door but from the outside of the doorit will be impossible for an unauthorized person to enter the house,even though such person is able to pick the regular locking mechanism ofthe door lock and even though he should be furnished with the proper keyfor said lock. It being desirable, however, for an authorized person tounlock. the door from the outer side thereof, it is designed to providean auxiliary key-hole 26 consisting merely of a key-hole slot extendingat a convenient point entirely through the door and so positioned as toreceive therethrough the hooked key 27 for engaging with the side ring28 of the locking hook I? and thereby elevating and releasing such hookfrom its engagement with the locking bolt.

While the forms of the invention herein shown and described are what arebelieved to be preferable embodiments thereof, it is nevertheless to beunderstood that various forms and modifications may be had withoutdeparting from the spirit and scope of the invention as claimed.

hat is claimed as new is 1. A device of the class described, comprisinga casing having a slot through the front wall thereof, a sliding lockingbolt within said casing having a transverse recess adapted for alinementwith said slot during the locked position of the bolt, an overbalancedlocking hook pivoted to and having its free end normally entering saidslot and engaging said bolt, a ring upon the side of said hook, and akey member adapted for withdrawing engagement with said ring.

2. A device of the class described, oom-- prising in combination with adoor having a key-hole slot therethrough, a lock casing positionedbeneath said slot and having a slot through the front wall thereof, asliding bolt within said casing having a recess there in adapted foralinement with said casing and wall slot, a weighted locking hookpivoted upon said casing and having its free end normally projectingthrough said casing wall slot and engaging said bolt, a ring upon saidhook, and a hook key adapted for reception through said key-hole slot inoperative engagement with said ring.

In testimony whereof I afliX my signature in presence of two witnesses.

JOHN DURAN. lVitnesses:

NM. L. VVATERBURY, HARRY B. NEvUs.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

